Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f51c73dcfba791…

MALICIOUS

PDF

40.9 KB Created: 2020-08-15 21:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 09408e336c0c43b5b493beaf1fe550b3 SHA-1: 07b7c8848f1464f8b4234e7ce30adbc12ecb7b95 SHA-256: f8f51c73dcfba791c9116ef1dc47a7b008736cf595b4f2cf1f38d47fbe5c5327
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and other URLs pointing to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=o In PDF document text
    • http://files.hcsatl.com/uploads/1/3/1/4/131437616/4317416.pdfIn PDF document text
    • http://zamezafi.dreamerpengh.com/uploads/1/3/0/7/130776485/2699329.pdfIn PDF document text
    • http://files.jcnentertainment.com/uploads/1/3/1/3/131379409/loxemudewirat.pdfIn PDF document text
    • http://files.legacy-318.com/uploads/1/3/1/4/131438432/zetenufataga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3831/files/70919270847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/46008944492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/gudopiwekosiwaxemute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0426/2561/files/69314707540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/najazobebarikanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/filsafat_humanisme_dan_renaissance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/18043353959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6829/6090/files/rationalisation_questions_for_class_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/13577784952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2458/8701/files/30726442188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/autoit_complete_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/batch_convert_word_to_mac.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 5596 bytes
SHA-256: 1aecf4c7d19dc7b2cbcb68165442a7b432fed5d6d3978d02607c90047848011a
font_01_sfnt_off0000748a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 9880 bytes
SHA-256: 8750a9b33b5cd0d1d48118d2acd3f55a711d20f0f6206e900f3879a37db9fbb5

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